Wevdn 4 PCS Deer Whistles for Car, Avoid Collisions Save Deer Warning Devices with Waterproof Adhesive Tapes, Universal Animal Alert Accessories for Cars, Trucks, Motorcycles (Black)

【Excellent Material】: Our deer whistle warning is made of ABS material, which is waterproof, strong and heat-resistant, and can withstand bad weather. It can run whether it is hot summer, extremely cold weather or cloudy and rainy day. Hence, with it, you can use it for a long time.

【Improve Safety】: Air passing through the Deer Whistle generates sound/ ultrasonic waves, which can give deer advance warning so they may stop and move at the side of the road instead of running across the road into the path of a vehicle. It can avoid a collision and ensure the safety of both the deer and the people in the car.

【Operating Principle】: The Deer Whistle runs successfully by generating signals of different frequencies through two enclosed holes of varying strength to cue deer to avoid vehicles. Day or night, it emits an auto ultrasonic sound when the vehicle speed exceeds 35 miles per hour and sounds a warning siren from a quarter mile away.

【Specific Installation】: Simply remove the adhesive backing and apply the whistle to the vehicle's grille, front bumper, mirrors or any flat area with its larger ends facing forward and level with the horizon. We recommend placing it where there is the most air circulation, as well as on the grille and front bumper.

【Widely Applicable】: We have 2 pieces and 4 pieces package in two quantities, you can buy it according to your needs. This deer whistle is suitable for all types of vehicles, including cars, motorcycles and trucks. Therefore, you can buy and use it without any worries.